ci: Use ubuntu-latest consistenly

It was supposed to be deprecated but that decision was reverted? weird

.github/workflows/CI.yml

@@ -30,7 +30,7 @@ name: CI
 jobs:
   check:
     name: Build
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     container:
       image: ghcr.io/gtk-rs/gtk4-rs/gtk4:latest
     strategy:
@@ -83,7 +83,7 @@ jobs:
 
   examples:
     name: examples
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     container:
       image: ghcr.io/gtk-rs/gtk4-rs/gtk4:latest
     steps:
@@ -101,7 +101,7 @@ jobs:
 
   fmt:
     name: rustfmt
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: actions-rs/toolchain@v1
@@ -159,7 +159,7 @@ jobs:
 
   checker:
     name: gtk-rs checker
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         crate:

.github/workflows/book-deploy.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     name: build
     steps:
       - uses: actions/checkout@v4

.github/workflows/book-lint.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   check:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     name: build
     steps:
       - uses: actions/checkout@v4

.github/workflows/docs.yml

@@ -30,7 +30,7 @@ on:
 
 jobs:
   build-deploy:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     name: build
     container:
       image: ghcr.io/gtk-rs/gtk4-rs/gtk4:latest

.github/workflows/listings.yml

@@ -14,7 +14,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     name: listings build
     container:
       image: ghcr.io/gtk-rs/gtk4-rs/gtk4:latest